Use @s2 buffer to store string representation of
tclass and get rid of extra SPRINT_BUF(): no
need to preserve @s2 contents for later.

Use print_string(PRINT_ANY, ...) with prepared by
snprintf() string for both PRINT_JSON and PRINT_FP
cases.

While there use __u32 for flowinfo in link_gre6.c
and check for IFLA_GRE_FLOWINFO attribute presense.

Signed-off-by: Serhey Popovych <serhe.popov...@gmail.com>
---
 ip/link_gre6.c   |   16 +++++-----------
 ip/link_ip6tnl.c |   16 +++++-----------
 2 files changed, 10 insertions(+), 22 deletions(-)

diff --git a/ip/link_gre6.c b/ip/link_gre6.c
index 87c313c..a02dd4a 100644
--- a/ip/link_gre6.c
+++ b/ip/link_gre6.c
@@ -380,7 +380,7 @@ static void gre_print_opt(struct link_util *lu, FILE *f, 
struct rtattr *tb[])
        unsigned int iflags = 0;
        unsigned int oflags = 0;
        unsigned int flags = 0;
-       unsigned int flowinfo = 0;
+       __u32 flowinfo = 0;
        struct in6_addr in6_addr_any = IN6ADDR_ANY_INIT;
 
        if (!tb)
@@ -471,17 +471,11 @@ static void gre_print_opt(struct link_util *lu, FILE *f, 
struct rtattr *tb[])
                           "ip6_tnl_f_use_orig_tclass",
                           "tclass inherit ",
                           true);
-       } else {
-               if (is_json_context()) {
-                       SPRINT_BUF(b1);
+       } else if (tb[IFLA_GRE_FLOWINFO]) {
+               __u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20;
 
-                       snprintf(b1, sizeof(b1), "0x%02x",
-                                ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20);
-                       print_string(PRINT_JSON, "tclass", NULL, b1);
-               } else {
-                       fprintf(f, "tclass 0x%02x ",
-                                ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20);
-               }
+               snprintf(s2, sizeof(s2), "0x%02x", val);
+               print_string(PRINT_ANY, "tclass", "tclass %s ", s2);
        }
 
        if (flags & IP6_TNL_F_RCV_DSCP_COPY)
diff --git a/ip/link_ip6tnl.c b/ip/link_ip6tnl.c
index e084975..05322fd 100644
--- a/ip/link_ip6tnl.c
+++ b/ip/link_ip6tnl.c
@@ -404,22 +404,16 @@ static void ip6tunnel_print_opt(struct link_util *lu, 
FILE *f, struct rtattr *tb
                           "hoplimit %u ",
                           rta_getattr_u8(tb[IFLA_IPTUN_TTL]));
 
-       if (flags & IP6_TNL_F_USE_ORIG_TCLASS)
+       if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
                print_bool(PRINT_ANY,
                           "ip6_tnl_f_use_orig_tclass",
                           "tclass inherit ",
                           true);
-       else if (tb[IFLA_IPTUN_FLOWINFO]) {
-               __u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS);
+       } else if (tb[IFLA_IPTUN_FLOWINFO]) {
+               __u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20;
 
-               if (is_json_context()) {
-                       SPRINT_BUF(b1);
-
-                       snprintf(b1, sizeof(b1), "0x%02x", (__u8)(val >> 20));
-                       print_string(PRINT_JSON, "tclass", NULL, b1);
-               } else {
-                       printf("tclass 0x%02x ", (__u8)(val >> 20));
-               }
+               snprintf(s2, sizeof(s2), "0x%02x", val);
+               print_string(PRINT_ANY, "tclass", "tclass %s ", s2);
        }
 
        if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
-- 
1.7.10.4

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